單人旁寂寞
[dān rén páng jì mò]
A poetic expression meaning 'the loneliness beside single strokes'. Here, '单人' means 'single person', while '旁' stands for the stroke on the side; metaphorically it indicates being lonely as if even the writing itself (with strokes representing solitude) is bearing the user's isolation and boredom, implying profound lonesomeness and melancholy.